内部类和匿名类
1.如何调用内部类：
class TestInnerClass{
public static void main( String[] args ){
Parcel p = new Parcel();//新建一个Parcel对象
p.testShip(); //测试
Parcel.Contents c = p.new Contents(33);
Parcel.Destination d = p.new Destination( "Hawii" );
p.setProperty( c, d );
p.ship();
}
}
class Parcel {
private Contents c;
private Destination d;
class Contents {
private int i;
Contents( int i ){ this.i = i; }
int value() { return i; }
}
class Destination {
private String label;
Destination(String whereTo) {label = whereTo;}
String readLabel() { return label; }
}
void setProperty( Contents c, Destination d ){
this.c =c; this.d = d;
}
void ship(){
System.out.println( "move "+ c.value() +" to "+ d.readLabel() );
}
public void testShip() {
c = new Contents(22);
d = new Destination("Beijing");
ship();
}
}
2.内部类中使用外部成员
public class TestInnerThis
{
public static void main(String args[]){
A a = new A();
A.B b = a.new B();
b.mb(333);
}
}
class A
{
private int s = 111;
public class B {
private int s = 222;
public void mb(int s) {
System.out.println(s); // 局部变量s
System.out.println(this.s); // 子类字段s
System.out.println(A.this.s); // 父类字段s
}
}
}
